import 'package:flutter/material.dart';
import 'package:flutter_app/GridView.dart';
import 'package:flutter_app/ListViewApp.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or press Run > Flutter Hot Reload in IntelliJ). Notice that the
        // counter didn't reset back to zero; the application is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
      routes: <String, WidgetBuilder>{
        'page_gridview': (BuildContext context) => new GridViewApp(),
        'page_ListView': (BuildContext context) => new ListViewApp()
      },
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return new Scaffold(
      appBar: new AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: new Text(widget.title),
      ),
      body: new Column(
          children: <Widget>[
            new MyListItem(Icons.access_alarms, "ListView", "page_ListView"),
            new MyListItem(Icons.ac_unit, "GridView", "page_gridview")
          ],

          // Center is a layout widget. It takes a single child and positions it
          // in the middle of the parent.
//          child: new RaisedButton(
//            onPressed: () {
//              Navigator.of(context).pushNamed("page_gridview");
//            },
//            child: new Text("GridViewApp"),
//            color: Colors.blue,
//          )
      ),
      floatingActionButton: new FloatingActionButton(
        onPressed: null,
        tooltip: 'Increment',
        child: new Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
      endDrawer: new Drawer(
        child: new Center(
          child: new Text("我是菜单"),
        ),
      ),
    );
  }
}

class MyListItem extends StatelessWidget {
  IconData iconData;
  String title;
  String page;

  MyListItem(this.iconData, this.title, this.page);

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return new GestureDetector(
        child: new Container(
          height: 60.0,
          color: Colors.white,
          child: new Row(
            children: <Widget>[
              new Icon(
                iconData,
                size: 25.0,
              ),
              new Text(title)
            ],
          ),
        ),
        onTap: () {
          Navigator.of(context).pushNamed(page);
        });
  }
}
